Gluing assembly for packaging machines



Nov. 17, 1953 R. E. TAGGAR GLUING ASSEMBLY FOR PACKAGING MACHINES Filed Aug. 18, 1951 3 Sheets-Sheet 1 0.667' EZ 135g@ 9AM WWM Nov. 17, 1953 R, E, TAGGART 2,659,341

GLUING ASSEMBLY FOR PACKAGING MACHINES Filed Aug. 18, 1951 3 Sheets-Sheet 2 5 v r 4 I I l n l l f I I f f I 4 g 5 f n f l l n 0,111,111 l Ollllllllll'llllllll l.

416 22g. @uw fm www NOV. 17, 1953 R, E TAGGART 2,659,341

GLUING ASSEMBLY FOR PACKAGING MACHINES Filed Aug. 18, 1951 5 Sheets-Sheet 5 Patented Nov. 17, 1953 GLUING ASSEMBLY FOR PACKAGING MACHINES Robert E. Taggart, Toledo, Ohio, assigner to Lynch Corporation, Anderson, Ind., a corporation of Ohio Application August 18, 1951, Serial N0. 242,505

11 Claims.

This invention relates to a gluing assembly for a packaging machine of the kind shown in Stevens Patent No. 2,292,487 of August l1, 1942, and is an improvement in the details of the gluing assembly as disclosed in that patent and in the copending application of Doepel and Wiley, Serial No. 103,875, filed July 9, 1949.

Gne object of the present invention is to provide a gluing assembly for supplying glue to a pulleysupported, glue-applying belt which has av section thereof between the pulleys .movable toward a wrapper for transferring glue on the belt to the wrapper, my improved gluing assembly featuring a readily removable gluepot which facilitates l cleaning thereof as the pot may be removed at the endof the days run andscaked in water for loosening any hardened glue so that it can be readily brushed out of the pot.

Another object is to provide a gluing assembly wherein glue is transferred from a glue-applying wheel to a glue-applying belt by centrifugal force as distinguished from actual contact of the wheel with the belt. n

Still another object is to provide an improved form of glue-applying wheel scraper whichproduces two thickened lines of glue on the periphery of the Wheel adjacent the sides thereof so that when this glue is thrown bycentrifugal `force on to the surface of the belt, it will be more evenly spread throughout the width of the belt.r

A further object is to provide a scraper for the belt after the glue` has beenjsupplied thereto which scrapes the sides and the marginal edges of the. glue-applying surface of the belt, thus leaving the central portion of the surface with the thickest layerrof glue andthe marginal edges substantially free of glue so that whenthe section and combination of the various parts of my gluing assembly for packaging machines, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, wherein:

Figure l is a plan view of a gluing assembly and associated mechanism of a packaging machine, the gluing assembly embodying my present i vention.

Figure 2 is an elevation of Figure 1 as viewed from the lower side of Figure 1.

Figure 3 is a perspective View of the removable gluepot of my present invention.

Figure 4 is an enlarged partial end view of the right hand end of Figure 2. l

Figure 5 is an enlarged vertical sectional view on the line 5-5 of Figure 2 showing the means for moving a section of the glue-applying belt between its supporting pulleys toward a wrapper, the means being in the raised position.

Figure 6 is an enlarged vertical sectional view on ,the line 6-6 of Figure 2 showing the means of Figure 5 in the lowered position for holding one part of the wrapper while a knife blade cuts a wrapper therefrom, and the glue-applying belt applying glue to the wrapper being cutoff.

Figure '7 is an enlarged vertical sectional view y on the line'I-l of Figure .1.

Figure 7a is an enlarged diagrammatic view on the line Tir-1a of Figure '7 showing the distribution of glue on the belt when it is ready to transferglue to the wrapper.

Figure 8 is a. vertical sectional view on the line 8-"8 of Figure 7. f

Figure 9 is an enlarged plan view showing ar glue-applying Wheel scraper illustrated in Figof the belt between the rollersis subsequently Y moved toward a Wrapper for transferring glue from the Vbelt to the wrapper,- the glue Iwill be deposited in a definite line ,acrossr the wrapper, tapering in thickness at the edges of the line of glue instead of being piled up adjacent the edges of such line as in previous constructions.

Still a further object ,is toprovide: a gluepot which is connected with and supported by a gear housing having a shaftand a glue-applying wheel projecting therefrom,pthe means of connection comprising a pair of screws that can be tightened to provide a glue-tight joint at a gasket strip between the gluepot and the gear housing Lor can be readily removed for permitting removal of the gluepot for soaking vand cleaning purposes.

With these and other Lobjects in view,V my invention consists in the construction, arrangement ure 1 in the lower leftvcorner thereof.

y Figure 10 is a vertical sectional viewY on the line blades forme glue-spraying belt.

Figure 11 is a diagrammatic View similar to a portion of Figure 7 showing the action of a glue-v applying wheel throwing glue `on the Yglue-applying belt by'centrifugal force. I K

Figures 11a and 11b are diagrammatic views on the respective lines I laf-I la and I Ib-i Ib of Figurell showing respectively the Vdistribution of glue onthe glue-applying lwheel immediately followingy the scraping of the wheel by a scraper blade, and the transferring of glue from the wheel tothe belt'by centrifugal action.

Figure 12 is a sectional view on the line 12V-#l2 ofFigure8;and y Figure 13 isa sectional view on the linekv l3l3 lll-I0 of Figure 7 showing particularly scraper 3 of Figure 8 showing only the gluepot and glueapplying wheel scraper which are part of the removable assembly.

On the accompanying drawings I have used the reference numeral I3 to indicate side frames of a packaging machine. Each side frame as shown in Figures l and 2 has a guide element I4. The lower edge of this element and the upper edge I5 of notches in the elements I3 form guide slots for a supporting bar I6.

The supporting bar I6 is adjustable horizontally along the side frames I3, the direction 4o1.' adjustment being toward and from the observer in Figure 2. This is accomplished by means of a pair of racks I1 on the lower` surface of the supporting bar I6 meshing with pinions I8 on an adjusting shaft I9. A hand wheel .28 is mounted on the shaft for rotating it, and a lock handle 2| is provided for retaining the adjustment once it is made. To indicate the degree of adjustment, a scale 54 is mounted on one -of the side frames I3 as shown in Figure 4 and -a pointer 65 on the supporting bar I6 cooperates therewith. The scale 54 may be graduated in inches or other suitable units to determine the proper setting of the gluing assembly depending upon the size of wrapper to be cut and glued.

lGear housings 22 and 23 are provided and they have a mounting flange 24 which is secured by bolts 25 to a depending arm 26 on the left hand end of the supporting bar I6 in Figure 2. A motor 21 is mounted on the gear housing 23 and through suitable gearing therein drives a shaft 28 (see Figure 8) which I shall term a motor driven shaft." A gear 29 is mounted on the shaft 28 in the gear housing 22 anda second gear 3| mounted on a glue-applying belt pulley shaft 3|! meshes therewith. A glue-applying belt pulley 32 is mounted on the shaft 30.

On the end of the supporting bar I6 opposite Ain with pistons (see Figure 5). The cylinders in turn are mounted on cylinder mounting brackets 42 which are supported on the bar I6.

Also carried by the piston rods 39 is a wrapper severing knife 43 having a serrated lower edge las shown in Figure 2. A paper holding blade 44 and a paper depressing blade 45 are also carried by the piston rods 39. Wrapper supporting shoes 46 and 41 are mounted on the supporting bar I6 to support the wrapper material shown at W. 'I'he shoe 46 is provided with a groove 48 Vfor the wrapper depressing blade 45 when in the Vlowered position shown in Figure 6. A slot 49 is provided between Vthe shoes 46 and 41 to permit entry of the wrapper severing knife 43 as also shown in this figure.

The wrapper holding blade 44 andthe wrapper depressing blade are mounted for limited independent movement relative to the bar I6 by securing them to a pair of plungers Iii) that .are reciprocable in sleeves :6I. In Aeach sleeve a spring 52 is interposed between .an `inturned ilange 6Ia.at the .upper end/of the sleeveandthe upper end of the plunger to normally force the plunger downwardly to the position shown in Figure 5 with a head 53 on the plunger engaging the upper end of the sleeve. When the parts are lowered to the position of Figure 6, the blade 44 resiliently engages the wrapper W due to the 'action of the spring 52 as shown in this gure.

Returning to Figure 8, I provide a glue-applying ing wheel 56 mounted on a glue-applying wheel shaft 51. The shaft 51 is rotatable in a bearing 66 Yof the gear housing 22 and is connected by a key 56 to the gear 29 to be driven thereby.

Partially surrounding the glue-applying wheel 56 is a gluepot 69 ot substantially rectangular shape (plan view). It is provided with two bosses 60 through which attaching bolts 6I extend and these are threaded into bosses 62 of the gear housing 22 as best shown in Figure 12. The gear housing 22 is also provided with a hub 63 which is substantially an enlarged part of the bearing 66, and the gluepot159 has a flange 64 of substantially the same shape as the outer limits of this boss. Interposed between the two is a gasket strip `66 to prevent leakage of glue when the gluepot is mounted with respect to the gear housing 22. The gasket may be cemented to the hub 63. This arrangement permits ready removal of the gluepot as a unit (Figure 3) so that it can be soaked in water for loosening any hardened deposits of glue thereon and `thus facilitate the cleaning of glue therefrom as by brushing to insure proper operation of the gluing assembly.

Referring to Figure 7, the gluepot 69 is provided with a mounting flange 61 on which is mounted a scraper blade 68. A clamp screw 69 serves to mount the blade, the screw extending through a slot 16 in the blade so that the blade can be adjusted toward or away from the glue applying wheel 56.

Referring to Figure 9, the scraper blade 66 is provided with a scraper slot, the sides of which are indicated at 1I and the bottom at 12. The bottom 12 is provided with a pair of notches 13 as illustrated, which are adjacent the sides of the slot, with the bottom of the slot between the notches contacting the periphery o! the wheel.

Referring to Figures 7 and 10, bracket ears 14 extend upwardly from the mounting flange 24 and support glue-applyingbelt scraper blades 16. Each blade is mounted by means of a clamp screw 16 extending through a slot 11 of the scraper blade and threaded -into the bracket ear 14. Each scraper blade is provided with side, corner and marginal' bottom scraping edges 16, 19 and 86 respectively. These t the sides, corners and bottom margins of the glue-applying belt 36 as shown in Figure 10 for the purpose of scraping excess glue therefrom and leaving glue only on Athe Vbottom vof the belt spaced inwardly from its side edges. The flange 24 as shown in Figure 'l is provided with a glue draining lip 8| back of the -scraper blades 16 to receive glue therefrom scraped on the belt by the blades and return such glue to the gluepot 69.

Practical operation In the operation of my 4gluing assembly for packaging machines, the gluepot 69 is mounted in position and filled with glue 62 to substantially the level-shown in Figure '1. The motor 21 is energized which causes the glue-applying Abelt 36 to be propelled in the direction of the arrows 82 in Figure 7, and the glue-applying `wheel 66 to be rotated elockwise'inthi's gure, as indicated by the arrow 84. The speed of rotation is such that centrifugal force will throw the glue on the wheel and on to the belt as indicated by the arrows 85 in Figure 11. Due to the peculiar shape of the slot 1l-12--13 in Figure 9, the periphery of the wheel 56 as it leaves the slot of the scraper blade 68 will have a -deposit of glue thereon substantially as shown in Figure lla. There will be a very thin lm of glue on the periphery between the marginal edges as shown at 86 and a relatively thicker layer of glue as indicated at 8l adjacent each marginal edge.

As a result of the glue deposit pattern illustrated by stippling in Figure 11a and just described, two thickened lines of glue 88 (see Figure 11b) will be thrown by centrifugal force onto the belt 3S, and the size of the notches 13 is such that by the time a particular point on the wheel 55 reaches the closest approach to the belt 36, most of the glue will have been thrown oi. This is illustrated by stippling in Figure 1lb with only a little of the glue remaining on the wheel and most of it deposited on the belt, thickest along the lines 88 and to some extent between these lines, the glue, due to capillary action, tending to spread substantially evenly alongthe lower' surface of the belt.

After the belt passes through the scraper blades l5, the deposit thereon will be substantially as shown at 89 in Figure 7a, that is, across the central portion of the belt but substantially scraped clean adjacent its marginal side edges. By the time the belt has traveled some little` distance, however, this glue Will tend to spread out and become thinner adjacent the marginal edges so that when the central section of the lower stretch of the belt is moved downwardly by the belt depressing shoe 31, it will deposit a line of glue on the wrapper W` which has been cut from the wrapper as in Figure 6, and the side edges of the glue will be feathered while the central portion will be thickest, which is a desirable distribution for proper gluing of the wrapper around the package.

At the end of a days run, the gluepot 59 can be readily removed by removing the two screws 5l and dropping the gluepot `down away from the hub 63. It can then be soaked in water and any dried glue loosened so that it can bereadily cleaned out. In cases where the machine is operated continuously, gluepots can be alternately used and soaked between usings. This arrangement makes for easy cleaning of the pots because of the possibility of easily ldisconnecting them from the gluing assembly.

The wheel scraper and belt scraper arrangement herein described I have found particularly adaptable for the type of gluing operationl disclosed. It is very effective to deposit a line of glue on the wrapper in exactly the manner that is best for performing the gluing operation when the glued flap of the wrapper is pressed against the package by the proper instrumentalities of the packaging machine.

Some changes may be made in the construction and arrangement of the parts of my gluing assembly for packaging machines without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims and modiiied forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim as my invention:

propelling said belt, and means for moving a section of the belt toward a wrapper fortransferring glue from the belt to the wrapper; means for applying glue to said belt comprising a gluepot, a glue-applying wheel rotatable therein with its periphery projecting above the surface of the glue in said gluepot, a scraper for said wheel, said scraper having a slot receiving the peripheral margin of said wheel, the sides of said slot contacting the sides of the wheel and the bottom of the slot having notches adjacent the sides of said slot with the bottom of the slot between said notches substantially contacting the periphery of the wheel to scrape the same between said notches, said glue-applying wheel being spaced propelling said belt, and means for moving ar section of the belt toward a Wrapper for transferring glue from the belt tothe wrapper; means for applying glue to said belt comprising a gluepot, a glue-applying Wheel rotatable therein with its periphery projecting above the surface of the glue in said gluepot, means for rotating said wheel, a scraper for said wheel, said scraper having a slot receiving the peripheral margin of said wheel, the sides of said slot contacting the sides of the wheel and the bottom of the slot having notches adjacent the sides of said slot, said wheel being spaced from said belt and being rotated at a speed to throw glue from said wheel onto the adjacent surface of the belt by centrifugal force.

3. A gluing l.assembly for a packaging machine having a pulley-supported glue-applying belt and means for moving a section of the belt between itssupporting pulleys toward a wrapper for transferring glue from the belt to the wrapper; said gluing assembly comprising a gluepot, a glue-applying wheel of less width than said belt, means for rotating said wheel, said wheel rotating in said gluepot with its periphery projecting above the surface of vthe glue therein and spaced from said belt to throw'glueonto the belt by centrifugal force, and a scraper for said wheel having a scraping surface provided with relieved portions adjacent the marginal edges of the wheel.

4. In a gluing assembly for a packaging machine having a vglue-applying belt, means for propelling said belt, and` means for moving a section of the belt toward a Wrapper for transferring glue from the belt to the wrapper; means for applying glue to said belt comprising a bearing, a shaft extending therefrom and driven by *j said rst means, a glue pot, said gluepot being removable relative to said bearing, "a gasket be'- vtween said gluepot and said bearing toV prevent glue leakage, a glue-applying wheel lmountedon l. In a gluing assembly for a packaging machine having a glue-applying belt, means Afor said shaft and rotatable in said gluepot with'its periphery projecting above the surface of the glue therein, a scraper for said wheel, said scraper having a slot receiving the peripheral margin of the wheel, the sides of said slot "contacting the sides of-the wheeland the bottom oi/saidslotl having notches adjacent the sides of said slot with the bottom of the slot between the notches substantially contacting the periphery of said wheel, said wheel being spaced from said glue belt and being rotatable bysaid shaft to ,throwk glue from saidwheel onto the belt by centrifugal force.

5. A gluing y for a packaging machine inning n glue-applying N-belt, means for propelling fsaid V-'belt,:and means for moving a section of said -V-.belt `toward awvrapper for transferring glue from kthe belt :to the wrapper; said gluing 'assembly comprising a boss, a shaft extending therefrorn'and driven by'said first means, a glue pot, said Vgluepot being removable relative to said boss and having .a portion 'to fit around it, a gasket .strip ybetween :said portion yand 'said boss to 'prevent :glue leakage, `a glue-applying wheel .mounted on said shaft and rotatable in said gluepot with :its periphery projecting above thesintface `of the tglue therein, means for rotating vsaid glue-applying wheel, a scraper therefor, and ascraper for'the sides,corners and marginal sches `of the glue receiving surface of vsaid belt.

f6. iin a gluing assembly for a packaging machine having a glue-applying ibelt, means for propelling said belt, and means for moving a section of the belt toward a Wrapper for transferring glue from the belt to the wrapper; means for applying glue to said belt comprising 'a boss, a shaft extending therefrom and driven by said first means, a glue pot, said gluepot being removable relative to said boss and having a portion to fit therearoundl a gasket interposed -between 'said portion and said boss to .prevent glue leakage, a glue-applying wheel mounted on-said shaft and rotatable in said gluepot with its periphery lprojecting above -the surface of the `glue therein, a scraper for said wheel, said wheel `being spaced from said glue belt and being rotated by said shaft at a speed to throw glue from said wheel onto said belt.

7. In a gluing assembly for a packaging machine having a glue-applying V-belt, means for propelling said V-belt, and means for moving a .section of the belt toward a wrapper for transferring Vglue from the belt tothe wrapper; means for applying glue to ysaid -belt comprising a gluepot. a glue-applying wheel rotatable therein with 'its periphery projecting above the surface of the lglue in said gluepot, a scraper for said wheel, said wheel being spaced from said beit, mea-ns for rotating said wheel at a speed sufiicient to throw glue from said wheel -onto the belt by :centrifugal lforce, and a scraper for said V-belt Vcomprising a scraper rblade for each -side thereof having Va scraping surface fitting the side and extending inwardly along the marginal edge of the gluereceiving surface of the belt, thereby 4leaving the central portion of said surface unscraped.

8. A gluing assembly for a packaging machine having a glue-applying V-belt, means for proand a scraper for said V-belt comprising a scraper 6 blade for each side thereof and for the inwardly yextending marginal edges of the belt.

9. In a gluing assembly for a packaging Imachine having a glue-applying belt, means tor propelling said belt, and means for moving a section of the belt toward a wrapper for transferring glue from the belt to the wrapper, .means for applying glue to said belt comprising a gluepot, .a glue-applying wheel rotatable therein with its periphery projecting above the surface of the glue in said gluepot, means for rotating said Wheel to throw glue therefrom onto a gluereceiving surface of the belt -by centrifugal force, and a scraper for said belt which scrapes the marginal edges of said surface and leaves the central portion :thereof unscraped.

'10. A gluing assembly for a packaging machine having a pulley-supported glue-applying belt and means for moving a section of the belt `between its supporting pulleys toward a wrapper for transferring glue from the belt to the wrapper; said gluing assembly comprising a gluepot, a glue-applying wheel rotatable therein with its periphery projecting above the surface of the glue in said gluepot 4and spaced from said belt to throw glue onto the belt by centrifugal force, means for rotating said wheel, and a scraper for said belt comprising a scraper blade for each side thereof having a lscraping surface fitting the side and extending inwardly along the marginal edge of the glued surfaceof the belt, thereby ,leaving the central portion of said surface unscraped.

i1. In a gluing assembly for a packaging machine having a glue-applying belt, means for propelling said belt, and means for moving a section of the belt downwardly toward a wrapper for transferring glue from the belt to the wrapper; means for applying glue to the lower surface of said belt comprising a. gluepot, a glueapplying wheel rotatable therein below said belt with its periphery projecting above the surface of the glue, said wheel being spaced below said belt and being rotated by said first means to throw glue -onto the lower surface thereof by centrifugal force, the means for moving a section of the belt toward a wrapper comprising a belt-depressing shoe and means for engaging the wrapper material carried by said shoe and movable independently thereof, said last means comprising wrapper holding and depressing blades, plungers carrying said blades, sleeves receiving said plungers slidably, spring means urging said plungers toward the wrapper, said plungers being slidable against the bias of said spring means to resiliently engage said wrapperholding blade with the wrapping material when the belt depressing shoe is in position for engaging the belt with the wrapper to transfer glue from the rbelt thereto.

ROBERT E. TAGGART.

References Cited in the `le nf this patent UNITED 'STATES PATENTS Number Name Date 2,022,521 Pierce Nov. 28. 1935 2,078,223 Andrew Apr. 27, 1937 2,292,487 Stevens Aug. 11, 1942 2,371,031 Davis Mar. 6, 1945 

